Licensing game in BGE
Ton just updated the following page but he did fail to mention anything about whether money can be made off BGE games.  

http://wiki.blender.org/index.php/Doc:2.6/Manual/Game_Engine/Licensing


  Licensing of Blender Games
  
  Blender and the Blender Game Engine (BGE) is licensed as GNU GPL,
  which means that your games (if they include Blender software) have to
  comply with that license as well. This only applies to the software,
  or the bundle if it has software in it, not to the artwork you make
  with Blender. All your Blender creations are your sole property.
  
  GNU GPL - also called "Free Software" - is a license that aims at
  keeping the licensed software free, forever. GNU GPL does not allow
  you to add new restrictions or limitations on the software you
  received under that license. That works fine if you want your clients
  or your audience to have the same rights as you have (with Blender).
  
  For people who prefer to lockup software or to restrict distribution
  or copying of their games, the BGE is not a good choice. The best they
  can achieve is to separate the contents (.blend files with game
  design) from the software (BGE) in their distribution, and license the
  first under own copyrights and keep the latter as GNU GPL. Standalone
  games
  
  In case you save out your game as a single "Standalone" the .blend
  file gets included in the binary (the BGE player). That requires the
  .blend file to be compatible with the GNU GPL license.
  
  In this case, you could decide to load and run another .blend file
  game (using the Game Actuator logic brick). That file then is not part
  of the binary, so you can apply any license you wish on it. More info
  
  More information you can find in the blender.org FAQ:
  http://www.blender.org/support/faq/
  
  (Disclaimer: the former text on this page was inaccurate and had wrong
  statements in it. The current text has been rewritten by Blender
  Foundation's chairman. If you have questions about GPL, consult the
  Free Software Foundation website fsf.org.